05/15/14
among the elements 0, 1, 2, 3...,13, 14 of Z(mod 15) please state all x for which x-1 fails to exist
among the elements 0, 1, 2, 3...,13, 14 of Z(mod 15) please state all x for which x^1 fails to exist
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04/30/14
Find the coefficient of x^2 in the expansion of [2x-(1/2x)]^6
In the expansion of the equation, find the coefficient of x2.
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